git.sesse.net Git - vlc/blob - src/playlist/engine.c

   1 /*****************************************************************************
   2  * engine.c : Run the playlist and handle its control
   3  *****************************************************************************
   4  * Copyright (C) 1999-2007 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Samuel Hocevar <sam@zoy.org>
   8  *          Clément Stenac <zorglub@videolan.org>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  23  *****************************************************************************/
  24
  25 #ifdef HAVE_CONFIG_H
  26 # include "config.h"
  27 #endif
  28
  29 #include <vlc/vlc.h>
  30 #include <vlc_vout.h>
  31 #include <vlc_sout.h>
  32 #include <vlc_playlist.h>
  33 #include <vlc_interface.h>
  34 #include "playlist_internal.h"
  35 #include "stream_output/stream_output.h" /* sout_DeleteInstance */
  36
  37 /*****************************************************************************
  38  * Local prototypes
  39  *****************************************************************************/
  40 static void VariablesInit( playlist_t *p_playlist );
  41
  42 static int RandomCallback( vlc_object_t *p_this, char const *psz_cmd,
  43                            vlc_value_t oldval, vlc_value_t newval, void *a )
  44 {
  45     (void)psz_cmd; (void)oldval; (void)newval; (void)a;
  46
  47     ((playlist_t*)p_this)->b_reset_currently_playing = VLC_TRUE;
  48     playlist_Signal( ((playlist_t*)p_this) );
  49     return VLC_SUCCESS;
  50 }
  51
  52 /**
  53  * Create playlist
  54  *
  55  * Create a playlist structure.
  56  * \param p_parent the vlc object that is to be the parent of this playlist
  57  * \return a pointer to the created playlist, or NULL on error
  58  */
  59 playlist_t * playlist_Create( vlc_object_t *p_parent )
  60 {
  61     playlist_t *p_playlist;
  62     vlc_bool_t b_save;
  63     int i_tree;
  64
  65     /* Allocate structure */
  66     p_playlist = vlc_object_create( p_parent, VLC_OBJECT_PLAYLIST );
  67     if( !p_playlist )
  68     {
  69         msg_Err( p_parent, "out of memory" );
  70         return NULL;
  71     }
  72
  73     TAB_INIT( p_playlist->i_sds, p_playlist->pp_sds );
  74
  75     p_parent->p_libvlc->p_playlist = p_playlist;
  76
  77     VariablesInit( p_playlist );
  78
  79     /* Initialise data structures */
  80     vlc_mutex_init( p_playlist, &p_playlist->gc_lock );
  81     p_playlist->i_last_playlist_id = 0;
  82     p_playlist->i_last_input_id = 0;
  83     p_playlist->p_input = NULL;
  84
  85     p_playlist->gc_date = 0;
  86     p_playlist->b_cant_sleep = VLC_FALSE;
  87
  88     ARRAY_INIT( p_playlist->items );
  89     ARRAY_INIT( p_playlist->all_items );
  90     ARRAY_INIT( p_playlist->input_items );
  91     ARRAY_INIT( p_playlist->current );
  92
  93     p_playlist->i_current_index = 0;
  94     p_playlist->b_reset_currently_playing = VLC_TRUE;
  95     p_playlist->last_rebuild_date = 0;
  96
  97     i_tree = var_CreateGetBool( p_playlist, "playlist-tree" );
  98     p_playlist->b_always_tree = (i_tree == 1);
  99     p_playlist->b_never_tree = (i_tree == 2);
 100
 101     p_playlist->b_doing_ml = VLC_FALSE;
 102
 103     p_playlist->b_auto_preparse =
 104                         var_CreateGetBool( p_playlist, "auto-preparse" ) ;
 105
 106     p_playlist->p_root_category = playlist_NodeCreate( p_playlist, NULL, NULL,
 107                                     0, NULL );
 108     p_playlist->p_root_onelevel = playlist_NodeCreate( p_playlist, NULL, NULL,
 109                                     0, p_playlist->p_root_category->p_input );
 110
 111     if( !p_playlist->p_root_category || !p_playlist->p_root_onelevel )
 112         return NULL;
 113
 114     /* Create playlist and media library */
 115     playlist_NodesPairCreate( p_playlist, _( "Playlist" ),
 116                             &p_playlist->p_local_category,
 117                             &p_playlist->p_local_onelevel, VLC_FALSE );
 118
 119     p_playlist->p_local_category->i_flags |= PLAYLIST_RO_FLAG;
 120     p_playlist->p_local_onelevel->i_flags |= PLAYLIST_RO_FLAG;
 121
 122     if( !p_playlist->p_local_category || !p_playlist->p_local_onelevel ||
 123         !p_playlist->p_local_category->p_input ||
 124         !p_playlist->p_local_onelevel->p_input )
 125         return NULL;
 126
 127     if( config_GetInt( p_playlist, "media-library") )
 128     {
 129         playlist_NodesPairCreate( p_playlist, _( "Media Library" ),
 130                             &p_playlist->p_ml_category,
 131                             &p_playlist->p_ml_onelevel, VLC_FALSE );
 132
 133         if(!p_playlist->p_ml_category || !p_playlist->p_ml_onelevel)
 134             return NULL;
 135
 136         p_playlist->p_ml_category->i_flags |= PLAYLIST_RO_FLAG;
 137         p_playlist->p_ml_onelevel->i_flags |= PLAYLIST_RO_FLAG;
 138     }
 139     else
 140     {
 141         p_playlist->p_ml_category = p_playlist->p_ml_onelevel = NULL;
 142     }
 143
 144     /* Initial status */
 145     p_playlist->status.p_item = NULL;
 146     p_playlist->status.p_node = p_playlist->p_local_onelevel;
 147     p_playlist->request.b_request = VLC_FALSE;
 148     p_playlist->status.i_status = PLAYLIST_STOPPED;
 149
 150     p_playlist->i_sort = SORT_ID;
 151     p_playlist->i_order = ORDER_NORMAL;
 152
 153     b_save = p_playlist->b_auto_preparse;
 154     p_playlist->b_auto_preparse = VLC_FALSE;
 155     playlist_MLLoad( p_playlist );
 156     p_playlist->b_auto_preparse = VLC_TRUE;
 157     return p_playlist;
 158 }
 159
 160 /**
 161  * Destroy playlist
 162  *
 163  * Destroy a playlist structure.
 164  * \param p_playlist the playlist object
 165  * \return nothing
 166  */
 167 void playlist_Destroy( playlist_t *p_playlist )
 168 {
 169     var_Destroy( p_playlist, "intf-change" );
 170     var_Destroy( p_playlist, "item-change" );
 171     var_Destroy( p_playlist, "playlist-current" );
 172     var_Destroy( p_playlist, "intf-popupmenu" );
 173     var_Destroy( p_playlist, "intf-show" );
 174     var_Destroy( p_playlist, "play-and-stop" );
 175     var_Destroy( p_playlist, "play-and-exit" );
 176     var_Destroy( p_playlist, "random" );
 177     var_Destroy( p_playlist, "repeat" );
 178     var_Destroy( p_playlist, "loop" );
 179     var_Destroy( p_playlist, "activity" );
 180
 181     vlc_mutex_destroy( &p_playlist->gc_lock );
 182     vlc_object_detach( p_playlist );
 183     vlc_object_release( p_playlist );
 184 }
 185
 186 /* Destroy remaining objects */
 187 static void ObjectGarbageCollector( playlist_t *p_playlist, vlc_bool_t b_force )
 188 {
 189     vlc_object_t *p_obj;
 190
 191     if( !b_force )
 192     {
 193         if( mdate() - p_playlist->gc_date < 1000000 )
 194         {
 195             p_playlist->b_cant_sleep = VLC_TRUE;
 196             return;
 197         }
 198         else if( p_playlist->gc_date == 0 )
 199             return;
 200     }
 201
 202     vlc_mutex_lock( &p_playlist->gc_lock );
 203     while( ( p_obj = vlc_object_find( p_playlist, VLC_OBJECT_VOUT,
 204                                                   FIND_CHILD ) ) )
 205     {
 206         if( p_obj->p_parent != VLC_OBJECT(p_playlist) )
 207         {
 208             vlc_object_release( p_obj );
 209             break;
 210         }
 211         msg_Dbg( p_playlist, "garbage collector destroying 1 vout" );
 212         vlc_object_detach( p_obj );
 213         vlc_object_release( p_obj );
 214         vout_Destroy( (vout_thread_t *)p_obj );
 215     }
 216     while( ( p_obj = vlc_object_find( p_playlist, VLC_OBJECT_SOUT,
 217                                                   FIND_CHILD ) ) )
 218     {
 219         if( p_obj->p_parent != VLC_OBJECT(p_playlist) )
 220         {
 221             vlc_object_release( p_obj );
 222             break;
 223         }
 224         msg_Dbg( p_playlist, "garbage collector destroying 1 sout" );
 225         vlc_object_detach( p_obj );
 226         vlc_object_release( p_obj );
 227         sout_DeleteInstance( (sout_instance_t*)p_obj );
 228     }
 229     p_playlist->b_cant_sleep = VLC_FALSE;
 230     vlc_mutex_unlock( &p_playlist->gc_lock );
 231 }
 232
 233 /**
 234  * Main loop
 235  *
 236  * Main loop for the playlist
 237  * \param p_playlist the playlist object
 238  * \return nothing
 239  */
 240 void playlist_MainLoop( playlist_t *p_playlist )
 241 {
 242     playlist_item_t *p_item = NULL;
 243     vlc_bool_t b_playexit = var_GetBool( p_playlist, "play-and-exit" );
 244     PL_LOCK;
 245
 246     if( p_playlist->b_reset_currently_playing &&
 247         mdate() - p_playlist->last_rebuild_date > 30000 ) // 30 ms
 248     {
 249         ResetCurrentlyPlaying( p_playlist, var_GetBool( p_playlist, "random" ),
 250                              p_playlist->status.p_item );
 251         p_playlist->last_rebuild_date = mdate();
 252     }
 253
 254 check_input:
 255     /* If there is an input, check that it doesn't need to die. */
 256     if( p_playlist->p_input )
 257     {
 258         if( p_playlist->request.b_request && !p_playlist->p_input->b_die )
 259         {
 260             PL_DEBUG( "incoming request - stopping current input" );
 261             input_StopThread( p_playlist->p_input );
 262         }
 263
 264         /* This input is dead. Remove it ! */
 265         if( p_playlist->p_input->b_dead )
 266         {
 267             int i_activity;
 268             input_thread_t *p_input;
 269             PL_DEBUG( "dead input" );
 270
 271             p_input = p_playlist->p_input;
 272             p_playlist->p_input = NULL;
 273
 274             /* Release the playlist lock, because we may get stuck
 275              * in input_DestroyThread() for some time. */
 276             PL_UNLOCK;
 277
 278             /* Destroy input */
 279             input_DestroyThread( p_input );
 280
 281             PL_LOCK;
 282
 283             p_playlist->gc_date = mdate();
 284             p_playlist->b_cant_sleep = VLC_TRUE;
 285
 286             if( p_playlist->status.p_item->i_flags
 287                 & PLAYLIST_REMOVE_FLAG )
 288             {
 289                  PL_DEBUG( "%s was marked for deletion, deleting",
 290                                  PLI_NAME( p_playlist->status.p_item  ) );
 291                  playlist_ItemDelete( p_playlist->status.p_item );
 292                  if( p_playlist->request.p_item == p_playlist->status.p_item )
 293                      p_playlist->request.p_item = NULL;
 294                  p_playlist->status.p_item = NULL;
 295             }
 296
 297             i_activity= var_GetInteger( p_playlist, "activity" );
 298             var_SetInteger( p_playlist, "activity", i_activity -
 299                             DEFAULT_INPUT_ACTIVITY );
 300             goto check_input;
 301         }
 302         /* This input is dying, let it do */
 303         else if( p_playlist->p_input->b_die )
 304         {
 305             PL_DEBUG( "dying input" );
 306             PL_UNLOCK;
 307             msleep( INTF_IDLE_SLEEP );
 308             PL_LOCK;
 309             goto check_input;
 310         }
 311         /* This input has finished, ask it to die ! */
 312         else if( p_playlist->p_input->b_error
 313                   || p_playlist->p_input->b_eof )
 314         {
 315             PL_DEBUG( "finished input" );
 316             input_StopThread( p_playlist->p_input );
 317             /* No need to wait here, we'll wait in the p_input->b_die case */
 318             goto check_input;
 319         }
 320         else if( p_playlist->p_input->i_state != INIT_S )
 321         {
 322             PL_UNLOCK;
 323             ObjectGarbageCollector( p_playlist, VLC_FALSE );
 324             PL_LOCK;
 325         }
 326     }
 327     else
 328     {
 329         /* No input. Several cases
 330          *  - No request, running status -> start new item
 331          *  - No request, stopped status -> collect garbage
 332          *  - Request, running requested -> start new item
 333          *  - Request, stopped requested -> collect garbage
 334         */
 335         if( p_playlist->request.i_status != PLAYLIST_STOPPED )
 336         {
 337             msg_Dbg( p_playlist, "starting new item" );
 338             p_item = playlist_NextItem( p_playlist );
 339
 340             if( p_item == NULL )
 341             {
 342                 msg_Dbg( p_playlist, "nothing to play" );
 343                 p_playlist->status.i_status = PLAYLIST_STOPPED;
 344                 PL_UNLOCK;
 345
 346                 if( b_playexit == VLC_TRUE )
 347                 {
 348                     msg_Info( p_playlist, "end of playlist, exiting" );
 349                     vlc_object_kill( p_playlist->p_libvlc );
 350                 }
 351                 ObjectGarbageCollector( p_playlist, VLC_TRUE );
 352                 return;
 353              }
 354              playlist_PlayItem( p_playlist, p_item );
 355          }
 356          else
 357          {
 358             const vlc_bool_t b_gc_forced = p_playlist->status.i_status != PLAYLIST_STOPPED;
 359
 360             p_playlist->status.i_status = PLAYLIST_STOPPED;
 361             if( p_playlist->status.p_item &&
 362                 p_playlist->status.p_item->i_flags & PLAYLIST_REMOVE_FLAG )
 363             {
 364                 PL_DEBUG( "deleting item marked for deletion" );
 365                 playlist_ItemDelete( p_playlist->status.p_item );
 366                 p_playlist->status.p_item = NULL;
 367             }
 368
 369             /* Collect garbage */
 370             PL_UNLOCK;
 371             ObjectGarbageCollector( p_playlist, b_gc_forced );
 372             PL_LOCK;
 373         }
 374     }
 375     PL_UNLOCK;
 376 }
 377
 378
 379 /**
 380  * Last loop
 381  *
 382  * The playlist is dying so do the last loop
 383  * \param p_playlist the playlist object
 384  * \return nothing
 385 */
 386 void playlist_LastLoop( playlist_t *p_playlist )
 387 {
 388     vlc_object_t *p_obj;
 389
 390     /* If there is an input, kill it */
 391     while( 1 )
 392     {
 393         PL_LOCK;
 394         if( p_playlist->p_input == NULL )
 395         {
 396             PL_UNLOCK;
 397             break;
 398         }
 399
 400         if( p_playlist->p_input->b_dead )
 401         {
 402             input_thread_t *p_input;
 403
 404             /* Unlink current input */
 405             p_input = p_playlist->p_input;
 406             p_playlist->p_input = NULL;
 407             PL_UNLOCK;
 408
 409             /* Destroy input */
 410             input_DestroyThread( p_input );
 411             continue;
 412         }
 413         else if( p_playlist->p_input->b_die )
 414         {
 415             /* This input is dying, leave it alone */
 416             ;
 417         }
 418         else if( p_playlist->p_input->b_error || p_playlist->p_input->b_eof )
 419         {
 420             input_StopThread( p_playlist->p_input );
 421             PL_UNLOCK;
 422             continue;
 423         }
 424         else
 425         {
 426             p_playlist->p_input->b_eof = 1;
 427         }
 428         PL_UNLOCK;
 429
 430         msleep( INTF_IDLE_SLEEP );
 431     }
 432
 433     /* close all remaining sout */
 434     while( ( p_obj = vlc_object_find( p_playlist,
 435                                       VLC_OBJECT_SOUT, FIND_CHILD ) ) )
 436     {
 437         vlc_object_detach( p_obj );
 438         vlc_object_release( p_obj );
 439         sout_DeleteInstance( (sout_instance_t*)p_obj );
 440     }
 441
 442     /* close all remaining vout */
 443     while( ( p_obj = vlc_object_find( p_playlist,
 444                                       VLC_OBJECT_VOUT, FIND_CHILD ) ) )
 445     {
 446         vlc_object_detach( p_obj );
 447         vlc_object_release( p_obj );
 448         vout_Destroy( (vout_thread_t *)p_obj );
 449     }
 450
 451     while( p_playlist->i_sds )
 452     {
 453         playlist_ServicesDiscoveryRemove( p_playlist,
 454                                           p_playlist->pp_sds[0]->p_sd->psz_module );
 455     }
 456
 457     playlist_MLDump( p_playlist );
 458
 459     PL_LOCK;
 460     /* Go through all items, and simply free everything without caring
 461      * about the tree structure. Do not decref, it will be done by doing
 462      * the same thing on the input items array */
 463     FOREACH_ARRAY( playlist_item_t *p_del, p_playlist->all_items )
 464         free( p_del->pp_children );
 465         free( p_del );
 466     FOREACH_END();
 467     ARRAY_RESET( p_playlist->all_items );
 468
 469     FOREACH_ARRAY( input_item_t *p_del, p_playlist->input_items )
 470         input_ItemClean( p_del );
 471         free( p_del );
 472     FOREACH_END();
 473     ARRAY_RESET( p_playlist->input_items );
 474
 475     ARRAY_RESET( p_playlist->items );
 476     ARRAY_RESET( p_playlist->current );
 477
 478     PL_UNLOCK;
 479 }
 480
 481 /**
 482  * Preparse loop
 483  *
 484  * Main loop for preparser queue
 485  * \param p_obj items to preparse
 486  * \return nothing
 487  */
 488 void playlist_PreparseLoop( playlist_preparse_t *p_obj )
 489 {
 490     playlist_t *p_playlist = (playlist_t *)p_obj->p_parent;
 491     input_item_t *p_current;
 492     int i_activity;
 493     uint32_t i_m, i_o;
 494
 495     while( !p_playlist->b_die )
 496     {
 497         vlc_mutex_lock( &p_obj->object_lock );
 498         while( p_obj->i_waiting == 0 )
 499         {
 500             vlc_cond_wait( &p_obj->object_wait, &p_obj->object_lock );
 501             if( p_playlist->b_die )
 502             {
 503                 vlc_mutex_unlock( &p_obj->object_lock );
 504                 return;
 505             }
 506         }
 507
 508         p_current = p_obj->pp_waiting[0];
 509         REMOVE_ELEM( p_obj->pp_waiting, p_obj->i_waiting, 0 );
 510         vlc_mutex_unlock( &p_obj->object_lock );
 511
 512         PL_LOCK;
 513         if( p_current )
 514         {
 515             if( p_current->i_type == ITEM_TYPE_FILE )
 516             {
 517                 stats_TimerStart( p_playlist, "Preparse run",
 518                                   STATS_TIMER_PREPARSE );
 519                 /* Do not preparse if it is already done (like by playing it) */
 520                 if( !input_item_IsPreparsed( p_current ) )
 521                 {
 522                     PL_UNLOCK;
 523                     input_Preparse( p_playlist, p_current );
 524                     PL_LOCK;
 525                 }
 526                 stats_TimerStop( p_playlist, STATS_TIMER_PREPARSE );
 527                 PL_UNLOCK;
 528                 input_item_SetPreparsed( p_current, VLC_TRUE );
 529                 var_SetInteger( p_playlist, "item-change", p_current->i_id );
 530                 PL_LOCK;
 531             }
 532             /* If we haven't retrieved enough meta, add to secondary queue
 533              * which will run the "meta fetchers".
 534              * This only checks for meta, not for art
 535              * \todo don't do this for things we won't get meta for, like vids
 536              */
 537             char *psz_arturl = input_item_GetArtURL( p_current );
 538             char *psz_name = input_item_GetName( p_current );
 539             if( !input_MetaSatisfied( p_playlist, p_current, &i_m, &i_o ) )
 540             {
 541                 preparse_item_t p;
 542                 PL_DEBUG( "need to fetch meta for %s", p_current->psz_name );
 543                 p.p_item = p_current;
 544                 p.b_fetch_art = VLC_FALSE;
 545                 vlc_mutex_lock( &p_playlist->p_fetcher->object_lock );
 546                 INSERT_ELEM( p_playlist->p_fetcher->p_waiting,
 547                              p_playlist->p_fetcher->i_waiting,
 548                              p_playlist->p_fetcher->i_waiting, p);
 549                 vlc_cond_signal( &p_playlist->p_fetcher->object_wait );
 550                 vlc_mutex_unlock( &p_playlist->p_fetcher->object_lock );
 551             }
 552             /* We already have all needed meta, but we need art right now */
 553             else if( p_playlist->p_fetcher->i_art_policy == ALBUM_ART_ALL &&
 554                         ( !psz_arturl || strncmp( psz_arturl, "file://", 7 ) ) )
 555             {
 556                 preparse_item_t p;
 557                 PL_DEBUG("meta ok for %s, need to fetch art", psz_name );
 558                 p.p_item = p_current;
 559                 p.b_fetch_art = VLC_TRUE;
 560                 vlc_mutex_lock( &p_playlist->p_fetcher->object_lock );
 561                 INSERT_ELEM( p_playlist->p_fetcher->p_waiting,
 562                              p_playlist->p_fetcher->i_waiting,
 563                              p_playlist->p_fetcher->i_waiting, p);
 564                 vlc_cond_signal( &p_playlist->p_fetcher->object_wait );
 565                 vlc_mutex_unlock( &p_playlist->p_fetcher->object_lock );
 566             }
 567             else
 568             {
 569                 PL_DEBUG( "no fetch required for %s (art currently %s)",
 570                           psz_name, psz_arturl );
 571                 vlc_gc_decref( p_current );
 572             }
 573             free( psz_name );
 574             free( psz_arturl );
 575             PL_UNLOCK;
 576         }
 577         else
 578             PL_UNLOCK;
 579
 580         vlc_mutex_lock( &p_obj->object_lock );
 581         i_activity = var_GetInteger( p_playlist, "activity" );
 582         if( i_activity < 0 ) i_activity = 0;
 583         vlc_mutex_unlock( &p_obj->object_lock );
 584         /* Sleep at least 1ms */
 585         msleep( (i_activity+1) * 1000 );
 586     }
 587 }
 588
 589 /**
 590  * Fetcher loop
 591  *
 592  * Main loop for secondary preparser queue
 593  * \param p_obj items to preparse
 594  * \return nothing
 595  */
 596 void playlist_FetcherLoop( playlist_fetcher_t *p_obj )
 597 {
 598     playlist_t *p_playlist = (playlist_t *)p_obj->p_parent;
 599     vlc_bool_t b_fetch_art;
 600     input_item_t *p_item;
 601     int i_activity;
 602
 603     while( !p_playlist->b_die )
 604     {
 605         vlc_mutex_lock( &p_obj->object_lock );
 606         while( p_obj->i_waiting == 0 )
 607         {
 608             vlc_cond_wait( &p_obj->object_wait, &p_obj->object_lock );
 609             if( p_playlist->b_die )
 610             {
 611                 vlc_mutex_unlock( &p_obj->object_lock );
 612                 return;
 613             }
 614         }
 615
 616         b_fetch_art = p_obj->p_waiting->b_fetch_art;
 617         p_item = p_obj->p_waiting->p_item;
 618         REMOVE_ELEM( p_obj->p_waiting, p_obj->i_waiting, 0 );
 619         vlc_mutex_unlock( &p_obj->object_lock );
 620         if( p_item )
 621         {
 622             if( !b_fetch_art )
 623             {
 624                 /* If the user doesn't want us to fetch meta automatically
 625                  * abort here. */
 626                 if( p_playlist->p_fetcher->b_fetch_meta )
 627                 {
 628                     input_MetaFetch( p_playlist, p_item );
 629                     var_SetInteger( p_playlist, "item-change", p_item->i_id );
 630                 }
 631
 632                 /*  Fetch right now */
 633                 if( p_playlist->p_fetcher->i_art_policy == ALBUM_ART_ALL )
 634                 {
 635                     vlc_mutex_lock( &p_obj->object_lock );
 636                     preparse_item_t p;
 637                     p.p_item = p_item;
 638                     p.b_fetch_art = VLC_TRUE;
 639                     INSERT_ELEM( p_playlist->p_fetcher->p_waiting,
 640                                  p_playlist->p_fetcher->i_waiting,
 641                                  0, p );
 642                     PL_DEBUG( "meta fetched for %s, get art", p_item->psz_name );
 643                     vlc_mutex_unlock( &p_obj->object_lock );
 644                     continue;
 645                 }
 646                 else
 647                     vlc_gc_decref( p_item );
 648             }
 649             else
 650             {
 651                 int i_ret;
 652
 653                 /* Check if it is not yet preparsed and if so wait for it (at most 0.5s)
 654                  * (This can happen if we fetch art on play)
 655                  * FIXME this doesn't work if we need to fetch meta before art ... */
 656                 for( i_ret = 0; i_ret < 10 && !input_item_IsPreparsed( p_item ); i_ret++ )
 657                 {
 658                     vlc_bool_t b_break;
 659                     PL_LOCK;
 660                     b_break = ( !p_playlist->p_input || input_GetItem(p_playlist->p_input) != p_item  ||
 661                                 p_playlist->p_input->b_die || p_playlist->p_input->b_eof || p_playlist->p_input->b_error );
 662                     PL_UNLOCK;
 663                     if( b_break )
 664                         break;
 665                     msleep( 50000 );
 666                 }
 667
 668                 i_ret = input_ArtFind( p_playlist, p_item );
 669                 if( i_ret == 1 )
 670                 {
 671                     PL_DEBUG( "downloading art for %s", p_item->psz_name );
 672                     if( input_DownloadAndCacheArt( p_playlist, p_item ) )
 673                         input_item_SetArtNotFound( p_item, VLC_TRUE );
 674                     else {
 675                         input_item_SetArtFetched( p_item, VLC_TRUE );
 676                         var_SetInteger( p_playlist, "item-change",
 677                                         p_item->i_id );
 678                     }
 679                 }
 680                 else if( i_ret == 0 ) /* Was in cache */
 681                 {
 682                     PL_DEBUG( "found art for %s in cache", p_item->psz_name );
 683                     input_item_SetArtFetched( p_item, VLC_TRUE );
 684                     var_SetInteger( p_playlist, "item-change", p_item->i_id );
 685                 }
 686                 else
 687                 {
 688                     PL_DEBUG( "art not found for %s", p_item->psz_name );
 689                     input_item_SetArtNotFound( p_item, VLC_TRUE );
 690                 }
 691                 vlc_gc_decref( p_item );
 692            }
 693         }
 694         vlc_mutex_lock( &p_obj->object_lock );
 695         i_activity = var_GetInteger( p_playlist, "activity" );
 696         if( i_activity < 0 ) i_activity = 0;
 697         vlc_mutex_unlock( &p_obj->object_lock );
 698         /* Sleep at least 1ms */
 699         msleep( (i_activity+1) * 1000 );
 700     }
 701 }
 702
 703 static void VariablesInit( playlist_t *p_playlist )
 704 {
 705     vlc_value_t val;
 706     /* These variables control updates */
 707     var_Create( p_playlist, "intf-change", VLC_VAR_BOOL );
 708     val.b_bool = VLC_TRUE;
 709     var_Set( p_playlist, "intf-change", val );
 710
 711     var_Create( p_playlist, "item-change", VLC_VAR_INTEGER );
 712     val.i_int = -1;
 713     var_Set( p_playlist, "item-change", val );
 714
 715     var_Create( p_playlist, "item-deleted", VLC_VAR_INTEGER );
 716     val.i_int = -1;
 717     var_Set( p_playlist, "item-deleted", val );
 718
 719     var_Create( p_playlist, "item-append", VLC_VAR_ADDRESS );
 720
 721     var_Create( p_playlist, "playlist-current", VLC_VAR_INTEGER );
 722     val.i_int = -1;
 723     var_Set( p_playlist, "playlist-current", val );
 724
 725     var_Create( p_playlist, "intf-popupmenu", VLC_VAR_BOOL );
 726
 727     var_Create( p_playlist, "intf-show", VLC_VAR_BOOL );
 728     val.b_bool = VLC_TRUE;
 729     var_Set( p_playlist, "intf-show", val );
 730
 731     var_Create( p_playlist, "activity", VLC_VAR_INTEGER );
 732     var_SetInteger( p_playlist, "activity", 0 );
 733
 734     /* Variables to control playback */
 735     var_CreateGetBool( p_playlist, "play-and-stop" );
 736     var_CreateGetBool( p_playlist, "play-and-exit" );
 737     var_CreateGetBool( p_playlist, "random" );
 738     var_CreateGetBool( p_playlist, "repeat" );
 739     var_CreateGetBool( p_playlist, "loop" );
 740
 741     var_AddCallback( p_playlist, "random", RandomCallback, NULL );
 742 }